“An overwhelming number of school shooters — 80 percent — display warning signs ahead of their attacks, such as discussing them online or in person, said Jillian Peterson, an associate professor of criminology and criminal justice at Hamline University in Minnesota.
“The most common is they tell their classmates,” said Peterson, who has studied hundreds of mass shooters. “We’ve studied school shootings where 50 students knew the perpetrator was thinking about it.
“We tend to think of these perpetrators as monsters, these outside, evil, awful people who do these horrific things, and of course, what they’re doing is monstrous. But we don’t think of them as insiders — that they are our classmates, our neighbors, our friends, our kids,” Peterson said. “It’s hard to imagine that the person sitting in front of you does this.'”
The following article discusses the social leakage before the Uvalde shootings as well as the commonalities of leakage before mass shootings.
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andSource: NBC News